text: /*-
   * Copyright (c) 1998 Softweyr LLC.  All rights reserved.
   *
   * strtok_r, from Berkeley strtok
   * Oct 13, 1998 by Wes Peters <wes@softweyr.com>
   *
   * Copyright (c) 1988, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notices, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notices, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY SOFTWEYR LLC, THE REGENTS AND CONTRIBUTORS
   * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
   * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL SOFTWEYR LLC, THE
   * REGENTS, OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
   * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD: releng/11.1/lib/libc/string/wcstok.c 251069 2013-05-28 20:57:40Z emaste $");
  
  #include <wchar.h>
  
  wchar_t *
  wcstok(wchar_t * __restrict s, const wchar_t * __restrict delim,
      wchar_t ** __restrict last)
  {
  	const wchar_t *spanp;
  	wchar_t *tok;
  	wchar_t c, sc;
  
  	if (s == NULL && (s = *last) == NULL)
  		return (NULL);
  
  	/*
  	 * Skip (span) leading delimiters (s += wcsspn(s, delim), sort of).
  	 */
  cont:
  	c = *s++;
  	for (spanp = delim; (sc = *spanp++) != L'\0';) {
  		if (c == sc)
  			goto cont;
  	}
  
  	if (c == L'\0') {	/* no non-delimiter characters */
  		*last = NULL;
  		return (NULL);
  	}
  	tok = s - 1;
  
  	/*
  	 * Scan token (scan for delimiters: s += wcscspn(s, delim), sort of).
  	 * Note that delim must have one NUL; we stop if we see that, too.
  	 */
  	for (;;) {
  		c = *s++;
  		spanp = delim;
  		do {
  			if ((sc = *spanp++) == c) {
  				if (c == L'\0')
  					s = NULL;
  				else
  					s[-1] = L'\0';
  				*last = s;
  				return (tok);
  			}
  		} while (sc != L'\0');
  	}
  	/* NOTREACHED */
  }
  